Home » Audio » Speaker » Interesting New Line Array Design
Re: Interesting New Line Array Design [message #61088 is a reply to message #61085] Tue, 29 September 2009 02:13 Go to previous messageGo to next message
darkmoebius2 is currently offline  darkmoebius2
Messages: 37
Registered: August 2009
Location: Los Angeles, CA
Baron
selahaudio wrote on Tue, 29 September 2009 00:19
Very good driver!
Yep, I think I found a good candidate to start with. At least, order a couple to do some of my own FR and listening tests with. (really low sensitivity, though - 80dB@1kHz/1W)

BTW, I found a post by Zaph on HT Guide forum where he mentions that it looks and tests exactly like the Aura NS3-193-8A(.pdf spec sheeet). And it sure looks like he is right.

Nominal Diameter . . . . . . . . . . . . . . 3 inches (70 mm)
Nominal Impedance (Z) . . . . . . . . . . 8 Ohms
Sensitivity, 1W/1m (E) . . . . . . . . . . . 80 dB @ 1 kHz
Power Capacity, RMS (Pe) . . . . . . . . 20 W
Power Capacity, Peak . . . . . . . . . . . 80 W
Frequency Range (-10dB) . . . . . . . . Fo - 15 kHz
Minimum Impedance . . . . . . . . . . . . 8 ohms
Voice Coil Diameter . . . . . . . . . . . . . 19.3 mm
Voice Coil Winding Length (h) . . . . . 6.5 mm
Voice Coil Number of Layers (n) . . . . 4
Voice Coil Former Material . . . . . . . . Kapton
Voice Coil Wire Composition . . . . . . CCAW
Magnetic Material . . . . . . . . . . . . . . Neodymium radial
Stray Flux Shielding . . . . . . . . . . . . . Inherent
Magnetic Gap Depth (He) . . . . . . . . 12.7 mm
Cone Material . . . . . . . . . . . . . . . . . Aluminum
Surround Material . . . . . . . . . . . . . . Rubber
Polarity, Outward Motion . . . . . . . . . Positive voltage on (+) tab
Net Weight . . . . . . . . . . . . . . . . . . . . 216 g
Maximum Excursion . . . . . . . . . . . . . 19 mm peak to peak

Thiele / Small Parameters

Resonant Frequency (Fo) - Fs . . . . . 80 Hertz
Voice Coil DC Resistance - Re . . . . . 7.6 Ohms
Total Q - Qts . . . . . . . . . . . . . . . . . . 0.67
Mechanical Q - Qms . . . . . . . . . . . . 8.0
Electrical Q - Qes . . . . . . . . . . . . . . 0..73
Equivalent Volume of Air - Vas . . . . . 1.25 L
Radiating Piston Area - Sd . . . . . . . . 31 cm 2
Electrical / Mechanical Parameters
Flux Density x Length - BL . . . . . . . . 4.7 Tesla-meters
Compliance - Cms . . . . . . . . . . . . . . 920 µm/N
Total Mass - Mms . . . . . . . . . . . . . . 4.3 grams
Xmax . . . . . . . . . . . . . . . . . . . . . . . . 9.5 mm peak to peak


My question, though, is that with that extremely low sensitivity, will 24 of them in an array be able to move enough air for moderately loud listening before distorting badly? Check out the distortion plot on the spec sheet.

Also, how about finding tweeters/ribbons that won't need a lot of padding down?

http://www.rapier-systems.com/nd90.jpg

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Re: Interesting New Line Array Design [message #61089 is a reply to message #61086] Tue, 29 September 2009 04:40 Go to previous messageGo to next message
AudioFred is currently offline  AudioFred
Messages: 377
Registered: May 2009
Location: Houston
Illuminati (1st Degree)
[quote title=selahaudio wrote on Tue, 29 September 2009 00:20
Fred,
I know of a system in Austin you should go hear. [/quote]

I'm in Austin at least once a month. This Sat I'll be at the Austin City Limits diy audio meeting.
http://www.diyaudioprojects.com/Forum/viewtopic.php?f=7&t=939

Next Sat I'll be back to hear my favorite Alt Rock group, Low Rent atx (notice the drummer and the lead guitar share my last name).
http://www.myspace.com/lowrentatx

Email or PM me about the owner of the system and I'll invite them to this weekend's audio meet.

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Re: Interesting New Line Array Design [message #61091 is a reply to message #61089] Tue, 29 September 2009 09:32 Go to previous messageGo to next message
selahaudio is currently offline  selahaudio
Messages: 56
Registered: September 2009
Baron
He travels quite a bit so I'll see if I can reach him.

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Re: Interesting New Line Array Design [message #61092 is a reply to message #61088] Tue, 29 September 2009 09:38 Go to previous messageGo to next message
selahaudio is currently offline  selahaudio
Messages: 56
Registered: September 2009
Baron
darkmoebius2 wrote on Tue, 29 September 2009 02:13
selahaudio wrote on Tue, 29 September 2009 00:19
Very good driver!
Yep, I think I found a good candidate to start with. At least, order a couple to do some of my own FR and listening tests with. (really low sensitivity, though - 80dB@1kHz/1W)

BTW, I found a post by Zaph on HT Guide forum where he mentions that it looks and tests exactly like the Aura NS3-193-8A(.pdf spec sheeet). And it sure looks like he is right.

Nominal Diameter . . . . . . . . . . . . . . 3 inches (70 mm)
Nominal Impedance (Z) . . . . . . . . . . 8 Ohms
Sensitivity, 1W/1m (E) . . . . . . . . . . . 80 dB @ 1 kHz
Power Capacity, RMS (Pe) . . . . . . . . 20 W
Power Capacity, Peak . . . . . . . . . . . 80 W
Frequency Range (-10dB) . . . . . . . . Fo - 15 kHz
Minimum Impedance . . . . . . . . . . . . 8 ohms
Voice Coil Diameter . . . . . . . . . . . . . 19.3 mm
Voice Coil Winding Length (h) . . . . . 6.5 mm
Voice Coil Number of Layers (n) . . . . 4
Voice Coil Former Material . . . . . . . . Kapton
Voice Coil Wire Composition . . . . . . CCAW
Magnetic Material . . . . . . . . . . . . . . Neodymium radial
Stray Flux Shielding . . . . . . . . . . . . . Inherent
Magnetic Gap Depth (He) . . . . . . . . 12.7 mm
Cone Material . . . . . . . . . . . . . . . . . Aluminum
Surround Material . . . . . . . . . . . . . . Rubber
Polarity, Outward Motion . . . . . . . . . Positive voltage on (+) tab
Net Weight . . . . . . . . . . . . . . . . . . . . 216 g
Maximum Excursion . . . . . . . . . . . . . 19 mm peak to peak

Thiele / Small Parameters

Resonant Frequency (Fo) - Fs . . . . . 80 Hertz
Voice Coil DC Resistance - Re . . . . . 7.6 Ohms
Total Q - Qts . . . . . . . . . . . . . . . . . . 0.67
Mechanical Q - Qms . . . . . . . . . . . . 8.0
Electrical Q - Qes . . . . . . . . . . . . . . 0..73
Equivalent Volume of Air - Vas . . . . . 1.25 L
Radiating Piston Area - Sd . . . . . . . . 31 cm 2
Electrical / Mechanical Parameters
Flux Density x Length - BL . . . . . . . . 4.7 Tesla-meters
Compliance - Cms . . . . . . . . . . . . . . 920 µm/N
Total Mass - Mms . . . . . . . . . . . . . . 4.3 grams
Xmax . . . . . . . . . . . . . . . . . . . . . . . . 9.5 mm peak to peak


My question, though, is that with that extremely low sensitivity, will 24 of them in an array be able to move enough air for moderately loud listening before distorting badly? Check out the distortion plot on the spec sheet.

Also, how about finding tweeters/ribbons that won't need a lot of padding down?

http://www.rapier-systems.com/nd90.jpg




The gain from 24 of them will give you good sensitivity so don't worry about the 80db spec. I've used the Aura version (they may make these too) and it's exceptionally good.

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Re: Interesting New Line Array Design [message #61104 is a reply to message #61092] Tue, 29 September 2009 19:20 Go to previous messageGo to next message
darkmoebius2 is currently offline  darkmoebius2
Messages: 37
Registered: August 2009
Location: Los Angeles, CA
Baron
selahaudio wrote on Tue, 29 September 2009 09:38
I've used the Aura version (they may make these too) and it's exceptionally good.
This is a great option and has serious extension advantages over the Peerless 830987 3" I was looking at. Scaena uses this driver(modified) in their $60k-80k line arrays.

http://www.tymphany.com/files/imagecache/product_graph/files/products/freq/830987.gif

Electrical Data
Nominal Impedance Zn 8 ohm
Minimum Impedance Zmin 6.4 ohm
Maximum Impedance Zo 50.6 ohm
DC Resistance Re 6.1 ohm
Voice Coil Inductance Le 0.5 mH
TS Parameters
Resonance Frequency fs 103 Hz
Mechanical Q factor QMS 5.9
Electrical Q factor QES 1.12
Total Q factor Qts 0.94
Ratio fs/Qts F 110
Force Factor Bl 2.95 Tm
Mechanical Resistance Rms 0.28 Kg/s
Moving Mass Mms 2.45 g
Suspension Compliance Cms 965.2 mm/N
Effective cone diameter D 6.3 cm
Effective Piston Area sd 31.1 cm^2
Equivalent Volume Vas 1.16 ltrs
Sensitivity 2.83V/1m 83.8 dB
Ratio BL/v Re 1.4

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Re: Interesting New Line Array Design [message #61108 is a reply to message #61104] Tue, 29 September 2009 19:53 Go to previous messageGo to next message
selahaudio is currently offline  selahaudio
Messages: 56
Registered: September 2009
Baron
darkmoebius2 wrote on Tue, 29 September 2009 19:20
selahaudio wrote on Tue, 29 September 2009 09:38
I've used the Aura version (they may make these too) and it's exceptionally good.
This is a great option and has serious extension advantages over the Peerless 830987 3" I was looking at. Scaena uses this driver(modified) in their $60k-80k line arrays.


The 830986 is the better choice in the Peerless drivers. That's the one I used with the BG planars. My first choice was the Aura but it wasn't available at that time.

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Re: Interesting New Line Array Design [message #61150 is a reply to message #60571] Sun, 11 October 2009 13:46 Go to previous messageGo to next message
AudioFred is currently offline  AudioFred
Messages: 377
Registered: May 2009
Location: Houston
Illuminati (1st Degree)
The designer/builder has posted test results:
http://www.trueaudio.com/array/MCLA_array_test_results.htm

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Re: Interesting New Line Array Design [message #61151 is a reply to message #61150] Sun, 11 October 2009 18:07 Go to previous messageGo to next message
darkmoebius2 is currently offline  darkmoebius2
Messages: 37
Registered: August 2009
Location: Los Angeles, CA
Baron
Those FR tests look pretty damn good. Of course, that doesn't have a lot to do with how things sound. It'll be interesting to see what his final listening tests reveal.

I wonder what the off-axis performance looks like?

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Re: Interesting New Line Array Design [message #61152 is a reply to message #61151] Sun, 11 October 2009 19:41 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18791
Registered: January 2001
Illuminati (33rd Degree)

I find it refreshing to see unsmoothed response curves posted, in addition to the more common highly smoothed charts. Showing response curves unsmoothed, as well as with 1/6th octave and 1/3rd octave processing is informative. I know a lot of people are used to seeing 1/3rd octave charts so when they see an unprocessed chart, they don't have a basis of comparison. Just about everything looks good with 1/3rd octave smoothing.

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Re: Interesting New Line Array Design [message #61159 is a reply to message #61152] Mon, 12 October 2009 05:16 Go to previous messageGo to previous message
AudioFred is currently offline  AudioFred
Messages: 377
Registered: May 2009
Location: Houston
Illuminati (1st Degree)
Wayne Parham wrote on Sun, 11 October 2009 19:41

I find it refreshing to see unsmoothed response curves posted, in addition to the more common highly smoothed charts.



It is refreshing, and I think I know why we don't see more of it. I believe a speaker manufacturer who publishes unsmoothed curves will see his sales drop like a rock. Very much like a woman who publishes an unretouched photo in a "women seeking men" online ad. Not making a moral judgement, just pointing out a marketing reality. Confused

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